ADSORPTION OF TRIHALOMETHANE FROM THE AQUEOUS-SOLUTION ON GRANULAR ACTIVATED CARBON AND ACTIVATED CARBON-FIBER

Adsorption of trihalomethane from aqueous solution on activated carbon fiber and granular activated carbon was examined in this study. As a result, adsorption isotherms for trihalomethane - activated carbon fiber and granular activated carbon system were fitted to the Freundlich equation and could be also approximated to the Henry equation because the slope of those fitting lines was nealy unity. Break-through curves for chloroform could be analyzed as a linear equilibrium system by using Babcock's method in the case of activated carbon fiber and Rosen's analytical solution in the case of granular activated carbon. In the latter case, those surface diffusivities were 2.1-6.6x10(12)m2.s-1, and in the former case the Peclet number Pe was about 4.8x10(-3). The product (k.n) of two equilibrium parameters for the Freundlich equation and a factor (beta) for the Henry equation related to boiling point T(B) of trihalomethane and the slope of lines related were similar, regardless of kinds of activated carbon used. However, the intercept was different from the value for the other activated carbon because of interaction between trihalomethanes and surfaces of the activated carbon.